Các câu hỏi tương tự
\(\frac{\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+....+\frac{1}{2011}}{\frac{2010}{1}+\frac{2009}{2}+\frac{2008}{3}+....+\frac{1}{2010}}\)
\(\frac{\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+....+\frac{1}{2011}}{\frac{2010}{1}+\frac{2009}{2}+\frac{2008}{3}+....+\frac{1}{2010}}\)
giup minh voi
CM rằng tổng
S=\(\frac{1}{2^2}-\frac{1}{2^4}+\frac{1}{2^6}-...+\frac{1}{2^{4n-2}}-\frac{1}{2^{4n}}+...+\frac{1}{2^{2002}}-\frac{1}{2^{2004}}< 0,2\)
Ai nhanh và đúng mk sẽ tick 3 tick:))
a) \(\frac{x+1}{10}+\frac{x+1}{11}+\frac{x+1}{12}=\frac{x+1}{13}+\frac{x+1}{14}\)
b) \(\frac{x+4}{200}+\frac{x+3}{201}=\frac{x+2}{202}+\frac{x+1}{203}\)
Tính:
\(A=\left(\frac{1}{125}-\frac{1}{1^3}\right).\left(\frac{1}{125}-\frac{1}{2^3}\right)\)\(...\left(\frac{1}{125}-\frac{1}{100^3}\right)\)
Ai nhanh mình tick cho
Tính :
M=\((\frac{0,4-\frac{2}{9}+\frac{2}{11}}{1,4-\frac{7}{9}+\frac{7}{11}}-\frac{\frac{1}{3}-0,25+\frac{1}{5}}{1\frac{1}{6}-0,875+0,7})\div\frac{2014}{2015}\)
Tính: \(-1-\frac{1}{2}-\frac{1}{4}-\frac{1}{8}-\frac{1}{16}-...-\frac{1}{1024}\)
\(\left(1+\frac{1}{2^2}\right)\cdot\left(1+\frac{1}{3^2}\right)\left(1+\frac{1}{4^2}\right).....\left(1+\frac{1}{n^2}\right)tính\)
Tinh nhanh
(\(\frac{1}{49}\)-\(\frac{1}{2^2}\)) . ( \(\frac{1}{49}\) - \(\frac{1}{3^2}\))........ ( \(\frac{1}{49}\) -\(\frac{1}{40^2}\))